PREMIUM HARDWARE DESIGN

With decades of experience, MSI is no stranger to building high performance motherboards. Their R&D and Engineering teams have reviewed countless designs and evaluated a wide selection of high quality components to develop products like this Motherboard for extended reliability even under extreme gaming conditions.

Cooling

THERMAL SOLUTION FOR MORE CORES AND HIGHER PERFORMANCE
With higher core Processors, thermal and power design is more important to make sure the temperature keeps lower. MSI extended PWM heatsink and enhanced circuit design ensures even high-end Intel CPU to run in full speed with MSI motherboards.

M.2 Shield Frozr
World's fastest SSDs can start to lower performance when getting hot. Part of the motherboards heatsink design, M.2 SHIELD FROZR is the next generation M.2 thermal solution to avoid this by offering the best thermal protection to make sure that SSD maintains maximum performance.

FULLY CONTROLLABLE IN BIOS AND SOFTWARE
MSI motherboards let you manage speeds and temperatures for all your system and CPU fans. Total Fan Control allows you check your primary system characteristics in a simplified graphical interface. You can also set up to 4 temperature targets for CPU and motherboard, which will adjust the fan speeds automatically.

Frozr AI Cooling
Detecting CPU & GPU temperatures and automatically adjusting fan duty of system fans to a proper value by adopting MSI AI ENGINE in the correct Peformance, Silent and Manual Modes.

OPTIMIZED FOR WATER COOLING
Designed to support the most popular All-In-One & customized water cooling solutions on the market, a dedicated water pump PIN header gives you full control of the water pump speed. A clearly marked "keep-out-zone" allows for easy and safe installation and a perfect fit.

Enhanced Performance

EZ M.2 Clip
Have trouble turning screws? MSI innovative EZ M.2 clip assist you install an M.2 SSD quickly and effortlessly.

EZ DEBUG LED
Ran into trouble? Onboard LEDs for key components will indicate the source of the problem so you know exactly where to look to get it up and running again.

Reliable Components

PCB Design
The PCB design has been optimized for higher bandwidth and faster transfer speeds, which is also beneficial for reliable circuit transmission.

• 6 PCB layers
• 2oz Thickened Copper Consruction

ENHANCED PERFORMANCE

Lightning Gen 4

Fast Future-Ready Storage
MSI motherboards support all the latest storage standards, which allows users to connect any ultra-fast storage device. Higher efficiency makes your work faster and easier.

Lightning Gen 4 PCIe
MSI lightning Gen 4 PCI-E is the latest and the fastest PCI-E data transfer solution with 64GB/s of transfer bandwidth that has doubled compared to its previous generation. PCIe 4.0 maintains both backward and forward compatibility with older and newer specifications.

Optane: Boost Your HDD to Perform Like a SSD
PC Enthusiasts can now enjoy the performance of an SSD on their HDD by coupling it with the new Intel® Optane™ Memory device. Intel® Optane™ technology provides an unparalleled combination of high throughput, low latency, high quality of service, and high endurance.

Memory

Memory Boost & XMP
MSI OC LAB does not merely work hard on extreme overclocking. The XMP memory profile has great improvement on performance and efficiency for B660. Easy to enable XMP profile with auto power settings to get the best memory speed and stability.

A Huge Step Up in DDR Performance
MSI OC LAB does not merely work hard on extreme overclocking. The XMP memory profile has great improvement on performance and efficiency for B660. Easy to enable XMP profile with auto power settings to get the best memory speed and stability.

Bios & Software

MSI Center
MSI brand new MSI Center unifies a suite of MSI software utilities into a single centralized application. Take control of advanced motherboards features and unleash endless possibilities.

Click Bios 5
Get more from a loaded BIOS designed for ease of use. Fine-tune the motherboard for gaming performance, efficiency, or overclocking world records!

• CREATOR GENIE
  Quickly overclock your CPU with a single button for more performance
• XMP
  Choose from a preset XMP profile and automatically overclock compatible DDR memory
• M-FLASH
  Conveniently flash or upgrade the BIOS in a few minutes from the CMOS Setup Utility
• HARDWARE MONITOR
  Get immediate access to your critical hardware information in real-time including temperature, memory capacity, clock speed, and voltage
• MEMORY TRY IT
  Get extreme speed out of your system memory and get more performance
• SEARCH & FAVORITES
  A permanent search & favorite option in the top right corner moves you through the BIOS menus quickly

RESIZABLE BAR
Resizable BAR (Re-Size BAR) is an advanced PCI Express feature that enables the CPU to access the entire GPU frame buffer at once and improve performance.

CONNECTIVITY

MSI Motherboards are built with a variety of connectors to satisfy gamers. Enhanced audio, advanced LAN networking capabilities, USB and Mystic Light turn any gaming experiences into immersive ones.

Networking

High Bandwidth and Low Latency Network
2.5Gbps LAN provides incredible data transfer speed faster than general Gigabit LAN. This is a premium solution for demanding users.

Optimize Online Gaming Traffic For Lower Latency!
MSI LAN Manager automatically classifies and prioritizes the latency-sensitive applications for online games, giving you the best online gaming experience with low latency.

MSI LAN Manager

• Automatically prioritizes games above other applications
• Allows you to change applications' traffic priority
• Allows you to customize bandwidth for each application

Audio

Audio Boost

• Dedicated High Definition Audio Processor
  Make sure you enjoy the purest sound quality in both stereo and surround sound
• High Quality Audio Capacitors
  A high fidelity sound experience with exceptional acoustics and realism for studio level headphones is ensured
• HD Audio Connectors
  Keep you sound perfect by transmit your audio with pure digital signal

Isolated Audio Signal

• Isolated Audio Design Like a dedicated sound card, audio components and circuits have been laid on a reserved motherboard section and electrically isolated
• Separated audio layers for clean left & right channels Using separated layers in the PCB ensures equally pristine sound quality for both left and right audio channels

De-Pop Protection

Audio Boost protects your ears by eliminating those annoying loud popping sounds when you plug/unplug devices or turn your PC on/off.

Additional Information:

Visit the Manufacturer Web Page for Full Details

System Requirements

• Windows® 11 / 10, 64-bit

I/O Panel

Make and Model	MSI B660-A DDR4 mATX Motherboard
CPU	Supports 12th Gen Intel® Core™ Processors Supports processor socket LGA1700 See supported processors
Chipset	Intel® B660 Chipset
Memory	4x DDR4 memory slots, support up to 128GB1 Stock Clocked RAM Support: Supports 1R 2133/2666/3200 MHz (by JEDEC & POR) Overclocked RAM Support: 1DPC 1R Max speed up to 4800+ MHz 1DPC 2R Max speed up to 4000+ MHz 2DPC 1R Max speed up to 4000+ MHz 2DPC 2R Max speed up to 3600+ MHz Supports Dual-Channel mode Supports non-ECC mode, un-buffered memory Supports Intel® Extreme Memory Profile (XMP) 1. Please refer to www.msi.com for more information on compatible memory. See supported memory
Expansion Slots	1x PCIe v4.0 x16 slot 1x PCIe v3.0 x16 slot 1x PCIe 3.0 x1 slot
Multi-GPU Support	Supports 2-Way AMD® CrossFire™ Technology
Onboard Graphics	1x HDMI v2.1 port, supports up to 3,840 x 2,160 @ 60Hz1,2 w/ HDR 1x DisplayPort v1.4 port, supports up to 3,840 x 2,160 @ 60Hz 1,2 w/ HBR3
Storage	4x SATA 6Gb/s ports 2x M.2 slots (Key M): M2_1 slot: PCIe 4.0 x4 supports 2242 / 2260 / 2280 M2_2 slot: PCIe 4.0 x4 / SATA III supports 2242 / 2260 / 2280 RAID Support: RAID 0, 1, 5, & 10 Supports Intel® Optane™ Memory Supports Intel® Smart Response Technology for Intel Core™ processors
USB	Internal USB Connector Support: 1x USB 3.2 Gen 1 (5Gbps) Connector supports 1x USB 3.2 Gen 1 Type-C port 1x USB 3.2 Gen 1 (5Gbps) Connector supports 2x USB 3.2 Gen 1 Type-A ports 2x USB 2.0 (480Mbps) Connector supports 4x USB 2.0 Type-A ports External Rear Ports: 2X USB 3.2 Gen 2 (10Gbps) Type-A port 2X USB 3.2 Gen 1 (5Gbps) Type-A ports 2x USB 2.0 (480Mbps) Type-A ports
LAN	1x Realtek® 8125BG 2.5Gbps RJ45 LAN port
Wireless Communication	None
Audio	Realtek® ALC897 Codec 7.1-Channel High Definition Audio 3x 3.5mm Audio jacks support multi channel Audio Output and Mic In
Back Panel I/O	1x PS/2 Keyboard / Mouse Cobo port 1x DisplayPort v1.4 port (up to 3,840 x 2,160 @ 60Hz) 1x HDMI v2.0 port (up to 3,840 x 2,160 @ 60Hz) 2X USB 3.2 Gen 2 (10Gbps) Type-A ports 2X USB 3.2 Gen 1 (5Gbps) Type-A ports 2x USB 2.0 (480Mbps) Type-A ports 1x 2.5Gbps RJ45 LAN port 3x 3.5mm Audio jacks support multi channel Audio Output and Mic In
Internal I/O Connectors	1x 24-pin ATX main power connector 1x 8-pin ATX 12V power connector 1x 4-pin ATX 12V power connector 1x 4-pin CPU fan connector 2x 4-pin system fan connectors 1x 4-pin water-pump fan connector 4x SATA III (6Gb/s) connectors 2x M.2 slots (M-Key) 1x USB 3.2 Gen 1 (5Gbps) Type-C port 1x USB 3.2 Gen 1 (5Gbps) Type-A connector (supports 2x USB 3.2 Gen 1 5Gbps ports) 2x USB 2.0 connectors (supports 4x USB 2.0 ports) 1x Front panel audio connector 2x System panel connectors 1x Chassis Intrusion connector 1x TPM module connector 1x Clear CMOS jumper 1x TBT connector (supports RTD3) 1x Serial port 1x Tuning Controller connector 1x 4-pin RGB LED connector 2x 3-pin RAINBOW LED connectors 4x EZ Debug LED
Operating System	Windows® 11 / 10, 64-bit
BIOS	TBA
I/O Controller	N/A
Form Factor	Micro-ATX
Dimensions (LxW)	244 x 244mm
Weight	N/A